Open AccessA Three‐Stage Model for the Inner Engine of Gamma‐Ray Bursts: Prompt Emission and Early Afterglow
Author(s) -
Jan E. Staff,
Rachid Ouyed,
Manjari Bagchi
Publication year - 2007
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/519545
Subject(s) - afterglow , physics , gamma ray burst , astrophysics , neutron star , ejecta , supernova , black hole (networking) , stage (stratigraphy) , context (archaeology) , astronomy , accretion (finance) , jet (fluid) , computer network , paleontology , routing protocol , routing (electronic design automation) , computer science , biology , link state routing protocol , thermodynamics
We propose a new model within the ``Quark-nova'' scenario to interpret therecent observations of early afterglows of long Gamma-Ray Bursts (GRB) with theSwift satellite. This is a three-stage model within the context of acore-collapse supernova. Stage 1 is an accreting (proto-) neutron star leadingto a possible delay between the core collapse and the GRB. Stage 2 is anaccreting quark-star, generating the prompt GRB. Stage 3, which occurs only ifthe quark-star collapses to form a black-hole, consists of an accretingblack-hole. The jet launched in this accretion process interacts with theejecta from stage 2, and could generate the flaring activity frequently seen inX-ray afterglows. This model may be able to account for both the energies andthe timescales of GRBs, in addition to the newly discovered early X-rayafterglow features.Comment: Accepted for publication in ApJ. Revised following the referees suggestion
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom